A patent for the Coralene decorating process was issued to Arthur Schierholz of Plausen, Thuringia, in the German Empire, on July 7, 1883.
Schierholz explained in his patent that “ornamental and other articles of glass, whether blown, cast or pressed, such as statuettes, vases, and the like, were decorated by first applying designs with enamel of a sirupy consistency, either colored or not, so that when the glass was subjected to heat, and thus provide it with a peculiar refracting vitreous coating that imparted great brilliancy to the colors.” Schierholz elaborated on his patent by including a means for decorating sheet glass and cathedral glass (stained glass) in the same manner.
Many patents registered abroad at that time were short lived, and this was tru of Schierholz’s patent for Coralene decorations. As early as 1886 several wholesalers of Bohemian glass were offering “Coral Beaded,” “Coralene Beaded,” and “Lustra,” decorated fancy wares in the trade journals. The Coralene decorated Burmese vase shown in our illustration was made at the Mt. Washington Glass Company, New Bedford, Massachusetts, around 1886.
It is quite possible that Coralene decorated articles marked “Patent” refer to the Schierholz process; but it does not necessarily mean that they were manufactured in Germany.
Lately a great many pieces of genuine art glass, mostly Pearl Satin, plain Satinglass and Burmese, have appeared on the market with newly applied coralene decoration. The perpetrators of this particular fake have copied the old designs faithfully using a flat finish yellow paint over which they have applied a transparent adhesive or glue. Tiny glass beads, of the kind experimentally used for highway safety devices, were applied to the article and adhered to the adhesive agent. The fakes can be readily detected – the beads fall off at a touch.